I have disregarded the no foul play comment. I believe that was early on and based on the terms that have been used recently about an on going investigation I believe that statement is outdated and was only referring to the information they had at the beginning. Much has changed since then I'm sure.
http://www.kansas.com/news/local/article128238609.html
As of the 23rd they were still claiming no foul play- which granted, is going on 2.5 weeks now... and if it were my child I would hope that they had garnered far more information on the case in that time frame- but I haven't been able to find any msm after this date to either further support or contradict this.